Photo by: David Tulis
Security employee Warren Johnson reviews messages at a nearly deserted Delta Air Lines counter after the carrier cancelled 573 flights into and out of Hartsfield-Jackson International Airport on Tuesday, Feb. 11, 2014 in Atlanta. The city dodged the first punch of a dangerous winter storm Tuesday, but forecasters warned of a potentially "catastrophic" second blow in a thick layer of ice that threatened to bring hundreds of thousands of power outages and leave people in their cold, dark homes for days. (AP Photo/David Tulis)